超低碳钢RH冶炼脱碳过程的数学模型

在充分考虑RH平衡碳氧浓度的前提下，建立脱碳反应数学模型．以210t超低碳钢RH冶炼工艺为背景，详细给出数学模型的建立原则与过程．将模拟结果与实际测量数据进行对比发现，数学模型与实际测量数据有很好的吻合度．碳元素在钢液内存在一定的不均匀性，真空室自由液面下降管上方碳元素质量分数最小，钢渣界面处上升管右侧碳元素质量分数最大，循环20min后，二者相差0．0025％左右．

Mathematical model of decarburization processes in RH refining for ultra-low carbon steel

In consideration of the equilibrium of C and O elements,a mathematical model was established for decarburization in RH refining.The principle and process of establishing the model were illustrated according to 210t RH refining for ultra-low carbon steel.A comparison between the modeling results and measuring data shows that the prediction of the mathematical model agrees well with industrial practice.There exists the nonuniform characteristic of carbon in liquid steel.The position with the minimum mass fraction of carbon is at the free surface in the vacuum chamber above the descending snorkel,while the position with the maximum mass fraction of carbon is at the interface between slag and liquid steel on the right side of the ascending snorkel.The difference between the maximum and minimum values is 0.002 5% after 20 min circulating.